linux-kernel - Re: [PATCH v8 33/38] kselftest/arm64: Add a GCS test program built with the system libc

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Message-ID: <878r329avw.fsf@linaro.org>
Date: Thu, 29 Feb 2024 19:13:55 -0300
From: Thiago Jung Bauermann <thiago.bauermann@...aro.org>
To: Mark Brown <broonie@...nel.org>
Cc: Catalin Marinas <catalin.marinas@....com>, Will Deacon
 <will@...nel.org>, Jonathan Corbet <corbet@....net>, Andrew Morton
 <akpm@...ux-foundation.org>, Marc Zyngier <maz@...nel.org>, Oliver Upton
 <oliver.upton@...ux.dev>, James Morse <james.morse@....com>, Suzuki K
 Poulose <suzuki.poulose@....com>, Arnd Bergmann <arnd@...db.de>, Oleg
 Nesterov <oleg@...hat.com>, Eric Biederman <ebiederm@...ssion.com>, Kees
 Cook <keescook@...omium.org>, Shuah Khan <shuah@...nel.org>, "Rick P.
 Edgecombe" <rick.p.edgecombe@...el.com>, Deepak Gupta
 <debug@...osinc.com>, Ard Biesheuvel <ardb@...nel.org>, Szabolcs Nagy
 <Szabolcs.Nagy@....com>, "H.J. Lu" <hjl.tools@...il.com>, Paul Walmsley
 <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou
 <aou@...s.berkeley.edu>, Florian Weimer <fweimer@...hat.com>, Christian
 Brauner <brauner@...nel.org>, linux-arm-kernel@...ts.infradead.org,
 linux-doc@...r.kernel.org, kvmarm@...ts.linux.dev,
 linux-fsdevel@...r.kernel.org, linux-arch@...r.kernel.org,
 linux-mm@...ck.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v8 33/38] kselftest/arm64: Add a GCS test program built
 with the system libc

Mark Brown <broonie@...nel.org> writes:

> [[PGP Signed Part:Undecided]]
> On Thu, Feb 22, 2024 at 11:24:59PM -0300, Thiago Jung Bauermann wrote:
>> Mark Brown <broonie@...nel.org> writes:
>
>> > I believe based on prior discussions that you're running this using
>> > shrinkwrap - can you confirm exactly how please, including things like
>> > which firmware configuration you're using?  I'm using current git with
>> >
>> >   shrinkwrap run \
>> >         --rtvar KERNEL=arch/arm64/boot/Image \
>> >         --rtvar ROOTFS=${ROOTFS} \
>> >         --rtvar CMDLINE="${CMDLINE}" \
>> >         --overlay=arch/v9.4.yaml ns-edk2.yaml
>> >
>> > and a locally built yocto and everything seems perfectly happy.
>> 
>> Yes, this is how I'm running it:
>> 
>>   CMDLINE="Image dtb=fdt.dtb console=ttyAMA0 earlycon=pl011,0x1c090000 root=/dev/vda2 ip=dhcp maxcpus=1"
>> 
>>   shrinkwrap run \
>>       --rtvar=KERNEL=Image-gcs-v8-v6.7-rc4-14743-ga551a7d7af93 \
>
> I guess that's bitrotted?

Ah, sorry. When I renamed the Image I messed up the kernel version in the
filename, but I did confirm via "uname -r" that I was running the
correct version: 6.8.0-rc2-ga551a7d7af93.

>> My rootfs is Ubuntu 22.04.3. In case it's useful, my kernel config is
>> here:
>
> ...
>
>> https://people.linaro.org/~thiago.bauermann/gcs/config-v6.8.0-rc2
>
> Thanks, it seems to be something in your config that's making a
> difference - I can see issues with that.  Hopefully that'll help me get
> to the bottom of this quickly.  I spent a bunch of time fighting with
> Ubuntu images to get them running but once I did they didn't seem to
> make much difference.

In that case, it's interesting that I still run into the problem with
the defconfig. One thing I failed to mention and perhaps is relevant
considering your result, is that I didn't copy the modules into the disk
image, so the FVP was running just with was built into the kernel.

That was actually the main reason for me to use a custom config:
I didn't want to have to deal with kernel modules, so I created a config
that didn't have any.

-- 
Thiago